$569 with 18-135 lens.
Lens (USA warranty) alone sells for $330 at B&H, and is worth every dollar.
Seller is Amazon.
B&H has this item at $699.
What am I missing? USA warranty?
You're probably missing a good deal if you don't buy it.
B&H is rather conservative with sale prices. Since the new Nikon announcements, and since the D40X has been around now for a while, Amazon is probably clearing their inventory expecting D40 to be end-of-lifed. If that is of no concern to you, then it's a good opportunity.
Do consider that you need motorized lenses with that camera. Regular ones will not autofocus.